escitalopram oxalate

Characters White crystalline powder, odorless, bitter. Melting range 148-152°C. Specific optical rotation +10.5°to +15.5° pH Between 2.4 and 3.4. Loss on drying Not more than 1.0%. Residue on ignition Not more than 0.1%. Heavy metals Not more than 20ppm Assay Not less than 98.5%. Limit of R-citalopram Not more than 0.5% Related substances Not more than 1.0% Toluene and tetrahydrofuran Toluene is not more than 0.089%, and tetrahydrofuran is not more than 0.072%.